Water stream flowing out the underground tunnel into the Lybid river in Kyiv. (rootstocks/iStock)

Image Provided by The Philippine Star

Onshore Wind Farm Farr, Scotland / Onshore-Windpark Farr, Schottland

The team Survey robot is seen as it conducts a demonstration of the level two challenge during the 2014 NASA Centennial Challenges Sample Return Robot Challenge, Thursday, June 12, 2014, at the Worcester Polytechnic Institute (WPI) in Worcester, Mass. Eighteen teams are competing for a $1.5 million NASA prize purse. Teams will be required to demonstrate autonomous robots that can locate and collect samples from a wide and varied terrain, operating without human control. The objective of this NASA-WPI Centennial Challenge is to encourage innovations in autonomous navigation and robotics technologies. Innovations stemming from the challenge may improve NASA’s capability to explore a variety of destinations in space, as well as enhance the nation’s robotic technology for use in industries and applications on Earth. Photo Credit: (NASA/Joel Kowsky)

Aerial view of redeveloped Benfield Industries site.

How it works: The idea behind wave energy is to harness the kinetic motion produced by the motion of waves. Philip Kithil’s system, seen in this rendering uses a set of buoys that convert wave energy into pressured water, which then powers a set of turbines. Courtesy Atmocean